2.1. You are asked to calculate the electric power required (in kWh) to heat all an alluminium wire (positioned) in a vacuum similar to a light bulb filament from 25C to 660C (liquid) to be used in a vapor deposition apparatus. The melting point of Al is 660C. The wire is 2.5 mm in diameter and has a length of 5.5cm. (The vapor deposition occurs at temperature in the vicinity of 900C ). (10) Data: For Al,Cp=20.0+0.0135T, where T is in K and Cp is in J/(g mol)(C). The Htusion =10.670J/(gmol)(C) at 660C. The density of Al is 19.35g/cm3. 2.2. One hundred kg of HCl gas are cooled from 300 to 150C at 1 atm pressure. Calculate H and U in kJ. The heat capacity equation found is: Cp=7.241.76103T+3.07106T2106T3 Where Cp is in (kgmol)(K)kgcal and T is in K 2.3. What is the enthalpy change that takes place when 3kg of water at 101.3kPa and 300K are vaporized to 15000kPa and 800K ? (5) [10 Marks]